3. Stage Briefs (stage-briefs/)

What it contains: Thirteen detailed design specifications covering all aspects of the D3-TUI implementation. Key files: SB-001.md through SB-013.md covering: - SB-001: Project Overview - SB-002: Terminal Core - SB-003: Render System - SB-004: Font System - SB-005: VMU Integration - SB-006: Input System - SB-007: Memory Management - SB-008: SPECTRE Integration - SB-009: SHACHI Patterns - SB-010: Build System - SB-011: Debugging Tools - SB-012: Testing Framework - SB-013: Delivery

Dependencies: References implementation details in src/ directory

4. Documentation (docs/)

What it contains: Additional documentation files supporting the stage briefs. Key files: - API.md - Detailed API reference - BUILD.md - Build instructions - DELIVERY.md - Release and distribution information

Dependencies: References both stage-briefs/ and src/ documentation